The Stanton Bird Club, owner and manager of Thorncrag Nature Sanctuary, will host a geology walk from 2 to 4 p.m. today. Join Bates College professor of geology Michael Retelle for a walk to the top of Thorncrag and adjacent areas to see the rock formations and glacial geology of this unique local feature. The event is free and open to the public. For more information, visit www.stantonbirdclub.org or call 784-8307. 

The Sportsman’s BARR in Gardiner is offering a youth archery league for children 7-14 years old starting today, from 11 a.m. to noon. Cost is $5 per child. The league will meet every Sunday at the same time. For more information call 588-0888. 

The Maine Chapter of the Appalachian Mountain Club will host a talk with slides about Maine Wilderness Lodges that are open for public use. The talk will be held Tuesday at 6:30 p.m. at Bangor Public Library, 145 Harlow St., in the Story Room. A member of the Maine AMC staff will describe the three log lodges open year-round for overnight accommodations and meals. The lodges are located in an area with lots of hiking, biking, skiing and snowshoeing trails surrounding the properties.  For more information, go online to amcmaine.org/calendar/ or email [email protected] 

Birds in the Chimney? 7 p.m. Tuesday. A “flying cigar,” the chimney swift is rarely seen perched. The swift’s high-pitched twittering, once a familiar sound during summertime, is now becoming scarce. Ted Allen, a leader in swift conservation, will talk about this unique species and what is being done for its conservation. Mather Auditorium of the Wells Reserve at Laudholm Farm, 342 Laudholm Farm Road, Wells. Free. www.york countyaudubon.org/ 

Naturalists’ Forum: Maine’s Rivers and Relics, 7 to 9 p.m. Wednesday at Gilsland Farm Audubon Center, Route One, Falmouth. Landis Hudson of Maine Rivers will host a screening of the film, “Maine’s Rivers and Relics.” Free. Call 781-2330, ext. 209 to register or for additional information. 

The Sierra Club Film Series will screen “Monumental: David Brower’s Fight for Wild America” at the First Parish Unitarian Universalist Church of Kennebunk at 7 p.m. on Friday.

Brower was an artist, publisher, filmmaker and a zealous crusader whose fiery dedication and activism helped inspire the environmental movement. After the film, Ken Cline will talk about the history of the U.S. environmental movement and take questions from the audience. Cline, who worked with Brower when Brower was on the Sierra Club board of directors, is a professor of environmental law and policy at the College of the Atlantic in Bar Harbor. The film is free and open to the public. Dessert will be served at 6:30 p.m. The series is sponsored jointly by the Maine Chapter of the Sierra Club and the Social Justice Committee of the church, which is located at 114 Main St. 

Looking ahead

“Maine Wildlife on the Move — Global Climate Change,” a Maine Audubon presentation, will be held at Jackson Memorial Library in Tenants Habor on Nov. 18 at 7 p.m.

Barbara Charry, a Maine Audubon biologist, will discuss climate change impacts on Maine’s wildlife and habitat and how Maine citizens can take action to address climate change. Details on current federal climate change legislation as well as efforts in Maine will be provided. The event is free and open to the public. The library is at 38 Main St. For more information call Becca Wilson at 781-2330 ext. 222, e-mail [email protected] audubon.org, call the library at 372-8961 or visit www.Jackson MemorialLibrary.org. 

Maine Guide Training Program at the Skowhegan Community Center, 39 Poulin Drive, Skowhegan, Dec. 2-5. The course prepares students for taking the state’s licensing exam for recreational, hunting and fishing guides. The cost is $475 per person, and a $200 deposit is required upon registration. To register, call Carroll Ware at Fins and Furs Adventures, 474-5430. 

Wetland Species ID in Winter, 9 a.m. to 1 p.m. Dec. 3, Coastal Maine Botanical Gardens, Boothbay Harbor. Instructor Lauren Stockwell builds knowledge and skills for recognizing wetland trees and shrubs in winter. Some familiarity with common wetland plants and taxonomy is helpful. Co-sponsored by New England Wild Flower Society and Coastal Maine Botanical Gardens. $44 (member) / $55 (nonmember). Pre-registration is necessary. Call 508-877-7630, ext. 3303.

The Sportsman’s BARR in Gardiner will host a handgun safety course on Thursday, Dec. 7, from 6 to 9 p.m. This class fulfills the requirements for a

safety course before applying for a concealed firearms permit. Classes fill up quickly so call to save a spot. Cost of the class is $50. For more information call 588-0888. 

Ongoing

The Portland Water District invites preschoolers to join it for environmentally themed stories, activities and crafts. The sessions include: Harvesting at Home, this Friday; Forest Friends, Dec. 17; the Wonders of Water, Jan. 21; Incredible Insects, Feb. 18; Plants and Their Parts, March 18; Fun with Frogs, April 15. The programs will run from 10 a.m. to noon at the Sebago Lake Ecology Center in Standish. Register now and pay $10 for the series. To register, e-mail [email protected] or call 774-5961 ext. 3319 or 3320. Donation supports local loon preservation. Scholarships available, snacks provided.

Weekly Bird Walk, Thursday mornings at Gilsland Farm, off Route One, Falmouth, 7 a.m., $5 for Maine Audubon members, $8 for nonmembers. All skill levels. Bring binoculars and a field guide and meet in the visitor center parking lot. 781-2330, ext. 209.

Bird Walks, 10 a.m. Thursdays, starting at the George B. Dorr Museum of Natural History, College of the Atlantic, Bar Harbor. With naturalist and student Anna Stunkel, through Nov. 18. For more information, contact [email protected] or call 288-5395.